Secure-Design

Security Engineering: Building Defensible Systems Defensible systems are built with the assumption that threats exist and mistakes will happen. The goal is to limit damage, detect problems early, and recover quickly. Start with business needs, not only tech, and design for failure as a default. Foundations of Defensible Design Secure by default: services run with minimal privileges and sensible defaults. Defense in depth: multiple, independent layers protect data and behavior. Threat modeling: identify likely attackers and weak links early. Resilience: systems tolerate faults and recover fast. Observability: strong logging, metrics, and alerts help you detect trouble. In practice, these ideas become concrete. Architecture reviews, regular threat modeling, and automated checks in CI/CD help lock in secure design before deployment. ...

Threat Modeling for Web Applications Threat modeling helps teams think clearly about how a web app could fail. It is a practical way to find design flaws early, before code blocks or tests are added. A light threat model can save time and strengthen trust with users. Begin with scope. List the parts of the system you care about: user interfaces, APIs, databases, and third‑party services. Identify the most valuable assets, such as user data, session tokens, admin endpoints, and API keys. Draw a simple data flow: user browser to server, server to database, services to and from external systems. This map shows where trust boundaries exist and where attackers could move. ...